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456=-130r-60r
We simplify the equation to the form, which is simple to understand
456=-130r-60r
We move all terms containing r to the left and all other terms to the right.
+130r+60r=-456
We simplify left and right side of the equation.
+190r=-456
We divide both sides of the equation by 190 to get r.
r=-2.4
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